Designed for use with a 104 BCD interface of any 104 BCD spider, This chainring utilizes our T-TYPE design and is backwards compatible with EAGLE technology (X-SYNC II). SRAM drivetrain engineers optimized this ring to combat the high-torque, high-wear situations e-bike riders face. The aggressive tooth design provides better chain retention for a smoother, more efficient pedal feel with a focus on long wear-life. FEATURES: 104 BCD Compatible. Steel (34T,36T,38T). Backwards compatible with other Eagle Technology. AeroGuard compatible with steel rings that Fufills EN 15194:2017 standard SPECS: Chainring size: 32T, 34T, 36T, 38T Bolt circle diameter (BCD): 104 BCD Speeds: 12s T-Type, n/a Compat - Yaw: n/a Material (chainring): Aluminum, Steel Color (chainring): Black Weight (g): 155 Weight based on: 38T